Add framework search path.

You can now add third part framework to Xcode project. Add the .framework file to XUPorter's iOS/ folder and add it to file section in projmods file.

XCBuildConfiguration.cs

@@ -8,6 +8,7 @@ public class XCBuildConfiguration : PBXObject
 		protected const string BUILDSETTINGS_KEY = "buildSettings";
 		protected const string HEADER_SEARCH_PATHS_KEY = "HEADER_SEARCH_PATHS";
 		protected const string LIBRARY_SEARCH_PATHS_KEY = "LIBRARY_SEARCH_PATHS";
+		protected const string FRAMEWORK_SEARCH_PATHS_KEY = "FRAMEWORK_SEARCH_PATHS";
 		protected const string OTHER_C_FLAGS_KEY = "OTHER_CFLAGS";
 		protected const string OTHER_LDFLAGS_KEY = "OTHER_LDFLAGS";
 
@@ -70,6 +71,11 @@ public bool AddLibrarySearchPaths( PBXList paths, bool recursive = true )
 		{
 			return this.AddSearchPaths( paths, LIBRARY_SEARCH_PATHS_KEY, recursive );
 		}
+
+		public bool AddFrameworkSearchPaths( PBXList paths, bool recursive = true )
+		{
+			return this.AddSearchPaths( paths, FRAMEWORK_SEARCH_PATHS_KEY, recursive );
+		}
 
 		public bool AddOtherCFlags( string flag )
 		{

XCProject.cs

@@ -283,6 +283,20 @@ public bool AddLibrarySearchPaths( PBXList paths )
 			return modified;
 		}
 
+		public bool AddFrameworkSearchPaths( string path )
+		{
+			return AddFrameworkSearchPaths( new PBXList( path ) );
+		}
+
+		public bool AddFrameworkSearchPaths( PBXList paths )
+		{
+			foreach( KeyValuePair<string, XCBuildConfiguration> buildConfig in buildConfigurations ) {
+				buildConfig.Value.AddFrameworkSearchPaths( paths );
+			}
+			modified = true;
+			return modified;
+		}
+
 		public object GetObject( string guid )
 		{
 			return _objects[guid];
@@ -334,9 +348,14 @@ public PBXDictionary AddFile( string filePath, PBXGroup parent = null, string tr
 						foreach( KeyValuePair<string, PBXFrameworksBuildPhase> currentObject in frameworkBuildPhases ) {
 							BuildAddFile(fileReference,currentObject,weak);
 						}
-						if ( !string.IsNullOrEmpty( absPath ) && ( tree.CompareTo( "SOURCE_ROOT" ) == 0 ) && File.Exists( absPath ) ) {
+						if ( !string.IsNullOrEmpty( absPath ) && ( tree.CompareTo( "SOURCE_ROOT" ) == 0 )) {
 							string libraryPath = Path.Combine( "$(SRCROOT)", Path.GetDirectoryName( filePath ) );
-							this.AddLibrarySearchPaths( new PBXList( libraryPath ) ); 
+							if (File.Exists(absPath)) {
+								this.AddLibrarySearchPaths( new PBXList( libraryPath ) ); 
+							} else {
+								this.AddFrameworkSearchPaths( new PBXList( libraryPath ) );  
+							}
+
 						}
 						break;
 					case "PBXResourcesBuildPhase":